diff --git a/alib2str/src/regexp/RegExpFromStringParser.cpp b/alib2str/src/regexp/RegExpFromStringParser.cpp
index c6a2062ff6b7b4d85c32664065ea80a42356d324..691e9b3eb3bdb282397fa61ab2702558129875e0 100644
--- a/alib2str/src/regexp/RegExpFromStringParser.cpp
+++ b/alib2str/src/regexp/RegExpFromStringParser.cpp
@@ -21,13 +21,17 @@ RegExp RegExpFromStringParser::parseRegExp(std::istream& input) {
 	return parseRegExp(input, ext::set<FEATURES>({FEATURES::FORMAL, FEATURES::UNBOUNDED}));
 }
 
+UnboundedRegExp < DefaultSymbolType > RegExpFromStringParser::parseUnboundedRegExp(std::istream& input) {
+	return UnboundedRegExp < DefaultSymbolType > { RegExpFromStringParser::parseUnboundedRegExpStructure ( input ) };
+}
+
 UnboundedRegExpStructure < DefaultSymbolType > RegExpFromStringParser::parseUnboundedRegExpStructure(std::istream& input) {
 	ext::rvalue_ref < UnboundedRegExpElement < DefaultSymbolType > > element = alternation(input);
 	return regexp::UnboundedRegExpStructure < DefaultSymbolType >(std::move(element));
 }
 
 RegExp RegExpFromStringParser::parseRegExp(std::istream& input, const ext::set<FEATURES>& features) {
-	UnboundedRegExp < > regexp { RegExpFromStringParser::parseUnboundedRegExpStructure ( input ) };
+	UnboundedRegExp < > regexp = RegExpFromStringParser::parseUnboundedRegExp ( input );
 
 	if(features.count(FEATURES::UNBOUNDED)) return RegExp { std::move ( regexp ) };
 
diff --git a/alib2str/src/regexp/RegExpFromStringParser.h b/alib2str/src/regexp/RegExpFromStringParser.h
index b22cacc12803c9ec1ad4fdb489d4d221fb06cfb3..c28a71c718948d83d66b7a5a23ac07dbb2877935 100644
--- a/alib2str/src/regexp/RegExpFromStringParser.h
+++ b/alib2str/src/regexp/RegExpFromStringParser.h
@@ -31,6 +31,7 @@ class RegExpFromStringParser {
 
 public:
 	static UnboundedRegExpStructure < DefaultSymbolType > parseUnboundedRegExpStructure(std::istream& input);
+	static UnboundedRegExp < DefaultSymbolType > parseUnboundedRegExp(std::istream& input);
 	static RegExp parseRegExp(std::istream& input);
 	static RegExp parseRegExp(std::istream& input, const ext::set<FEATURES>& features);
 };
diff --git a/alib2str/src/regexp/RegExpStringApi.cpp b/alib2str/src/regexp/RegExpStringApi.cpp
index e896ad537d847ce2f59642ef96a47a9d6153533f..c42703b1b715844c10a919e9eb9a8104e5216be4 100644
--- a/alib2str/src/regexp/RegExpStringApi.cpp
+++ b/alib2str/src/regexp/RegExpStringApi.cpp
@@ -19,6 +19,14 @@ void stringApi < regexp::RegExp >::compose ( std::ostream & output, const regexp
 	return regexp::RegExpToStringComposer::compose ( output, data );
 }
 
+regexp::UnboundedRegExp < DefaultSymbolType > stringApi < regexp::UnboundedRegExp < DefaultSymbolType > >::parse ( std::istream & input ) {
+	return regexp::RegExpFromStringParser::parseUnboundedRegExp ( input );
+}
+
+void stringApi < regexp::UnboundedRegExp < DefaultSymbolType > >::compose ( std::ostream & output, const regexp::UnboundedRegExp < DefaultSymbolType > & data ) {
+	return regexp::RegExpToStringComposer::compose ( output, data );
+}
+
 regexp::UnboundedRegExpStructure < DefaultSymbolType > stringApi < regexp::UnboundedRegExpStructure < DefaultSymbolType > >::parse ( std::istream & input ) {
 	return regexp::RegExpFromStringParser::parseUnboundedRegExpStructure ( input );
 }
diff --git a/alib2str/src/regexp/RegExpStringApi.hpp b/alib2str/src/regexp/RegExpStringApi.hpp
index 82f054ccb263752e9ad02cc78977febbd9b6bf92..71ce68c25e0641bc048328077f0500ae73e23ef0 100644
--- a/alib2str/src/regexp/RegExpStringApi.hpp
+++ b/alib2str/src/regexp/RegExpStringApi.hpp
@@ -20,6 +20,12 @@ struct stringApi < regexp::RegExp > {
 	static void compose ( std::ostream & output, const regexp::RegExp & data );
 };
 
+template < >
+struct stringApi < regexp::UnboundedRegExp < DefaultSymbolType > > {
+	static regexp::UnboundedRegExp < DefaultSymbolType > parse ( std::istream & input );
+	static void compose ( std::ostream & output, const regexp::UnboundedRegExp < DefaultSymbolType > & data );
+};
+
 template < >
 struct stringApi < regexp::UnboundedRegExpStructure < DefaultSymbolType > > {
 	static regexp::UnboundedRegExpStructure < DefaultSymbolType > parse ( std::istream & input );